attractive is pretty subjective, so I think of it not as "here's my improvement" in this context, but as "this is what my style used to be, in a time period where this sort of thing used to be attractive." Because every art style has been attractive to someone at some time. So like in art school, I got hella into more retro textures and acrylic and having darker color themes and contrast. I also really enjoyed works by abstract painters like Wassily Kandinsky because he was able to do really interesting technical things that made neat textures that I tried to apply (unsuccesfully) to illustration.
This made sense because at the time I was learning it was like 20 years ago and computers and Iphones were everywhere but they weren't how we consumed media as often--we would youknow...buy books. I was taught by professors who were freelance magazine and newspaper illustrators, where intense, toothy grungy texture was king because of how quickly it could be painted. Newspaper illustration, in particular, has to be able to start and finish a painting in the matter of 3-4 hours. We couldn't use bright ass colors because they couldn't be reproduced with printers unless you spent a lot of money to buy flourescent ink (and yes, I had a friend who did that for a comic run he did. He had to kickstart it because it was so expensive to print.)
And like I painted too dark for print, honestly, and constantly got dinged for it when I was graded, but my work looked a lot like this:

And truth is, I still really like this style when I see it, this loosey goosey Tim Burton character design with the grunge and steampunk flare. That warm lighting reminescent of Twilight Princess fog--I still love this stuff although it wouldn't work now that we expect to see digital art that is highly rendered because you can just zoom like hell, and art that is very saturated because we no longer have to print. We just use social media.
So, when I felt more confident in my ability to paint and realized that my style was dated, I started making a style that worked better for an online audience. Now my art is vibrant and polished, because I could have done it the whole time, I was just interested in retro looks and painting techniques that were pretty 90's even in the 00's. I no longer use heavy acrylic medium to drybrush my art, I'm completely digital, and I expect I will probably change again depending on work and technology. Maybe we can go back to acrylic one day? That was a fun time.